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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
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 *
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package org.graalvm.tools.api.lsp;

import java.util.List;

import com.oracle.truffle.api.instrumentation.TruffleInstrument.Env;

/**
 * Command interface provided by a {@link LSPExtension}.
 */
public interface LSPCommand {

    /**
     * Get the name of the command.
     */
    String getName();

    /**
     * Execute the command.
     */
    Object execute(LSPServerAccessor server, Env env, List<Object> arguments);

    /**
     * Define a timeout for the execution of the command.
     */
    default int getTimeoutMillis() {
        return -1;
    }

    /**
     * Fallback behavior in case the command's execution exceeded the timeout. Only required if
     * {@link #getTimeoutMillis()} is overridden and returns a value greater zero.
     */
    default Object onTimeout(List<Object> arguments) {
        String argumentString = String.join(", ", arguments.toArray(new String[0]));
        if (getTimeoutMillis() > 0) {
            throw new RuntimeException("onTimeout not overriden. Arguments: " + argumentString);
        } else {
            throw new AssertionError("onTimeout triggered on negative or zero timeout. Arguments: " + argumentString);
        }
    }
}
